Barcode scanner principles and types of barcode scanner is a device for reading the information contained in the bar code, bar code readers structure is usually the following parts: a light receiving device, a photoelectric conversion unit, decoding circuitry, computer interface. Their basic working principle is: the light emitted by the light source through the optical system is irradiated to the bar code symbol above the light is reflected back through the optical system image on the photoelectric converter to make it a one-dimensional scanner generates an electrical signal, the signal after amplification circuit After generating an analog voltage scanner, it is irradiated onto the bar code symbol is reflected light is proportional to the Bluetooth wireless scanner, and then after filtering, shaping, forming a corresponding analog signal square wave signal, the decoder interpreted as computer can directly receive the digital signals. Common barcode scanner typically uses the following three techniques: light pen, CCD, laser, they have their own advantages and disadvantages, no one scanner can have an advantage in all respects. New World NEWLAND HR200 handheld scanner's "on / off, standby, and restart" (1) scanning gun boot with a data cable and a data HR200 scanner is connected properly after receiving host, HR200 scanner will automatically power on and enters the standby state. After power-on HR200 scanner can be set newsletter, you can start reading, and reading various settings related. 2) shut off the power shutdown scanner 808 laser scanner, based on on-line differ: remove the data cable from HR200 scanner; if the RS232 connection, you can unplug the power cord RS232; if you have a USB connection,? data received from the host computer can unplug the USB cable;? If a PS / 2 connection, you can unplug the receiving host PS / 2 line from the data. If using a power adapter, too? Need to remove it. 3 state) scanner standby readers do not read the code when is the standby state. After the completion of the previous reading to be triggered during the next read code reader will automatically enter standby mode. 4) If the scanner to restart due to some special circumstances leading to the reader does not work, you can complete the scanner off and then boot to restart operations. Guangzhou State Association _ _ laser scanner 800 scanner provided by the Canton State Association. Looking for "cash register, scanner, bar code machines, management software, a small ticket machines, cash registers, shredders" fly suppliers, choose to have the entire network ShangMeng Certified: Guangzhou Contracting State Information Technology Co., Ltd. ( www.gzdb899.com), trustworthiness and reliability, now click on "Commercial Union customer service" on page live chat with us now!